Synthesis and Electrochemical Properties of Two-Dimensional Hafnium   Carbide

doi:10.1021/acsnano.7b00030

CORC > 北京大学 > 工学院

	Synthesis and Electrochemical Properties of Two-Dimensional Hafnium Carbide
	Zhou, Jie ; Zha, Xianhu ; Zhou, Xiaobing ; Chen, Fanyan ; Gao, Guoliang ; Wang, Shuwei ; Shen, Cai ; Chen, Tao ; Zhi, Chunyi ; Eklund, Per ; Du, Shiyu ; Xue, Jianming ; Shi, Weiqun ; Chai, Zhifang ; Huang, Qing
刊名	ACS NANO
	2017
关键词	MXenes selective etching 2D materials DFT calculations electrochemical properties TRANSITION-METAL CARBIDES HIGH VOLUMETRIC CAPACITANCE 2D TITANIUM CARBIDE LI-ION BATTERIES ENERGY-STORAGE MECHANICAL-PROPERTIES MOLYBDENUM CARBIDE SURFACE-STRUCTURE LAYERED CARBIDES MAX PHASE
DOI	10.1021/acsnano.7b00030
英文摘要	We demonstrate fabrication of a two-dimensional Hf-containing MXene, Hf3C2Tz, by selective etching of a layered parent Hf-3[Al(Si)](4)C-6 compound. A substitutional solution of Si on Al sites effectively weakened the interfacial adhesion between Hf-C and Al(Si)-C sublayers within the unit cell of the parent compound, facilitating the subsequent selective etching. The underlying mechanism of the Si-alloying-facilitated etching process is thoroughly studied by first-principles density functional calculations. The result showed that more valence electrons of Si than Al weaken the adhesive energy of the etching interface. The MXenes were determined to be flexible and conductive. Moreover, this 2D Hf-containing MXene material showed reversible volumetric capacities of 1567 and 504 mAh cm(-3) for lithium and sodium ions batteries, respectively, at a current density of 200 mAg(-1) after 200 cycles. Thus, Hf3C2Tz MXenes with a 2D structure are candidate anode materials for metal-ion intercalation, especially for applications where size matters.; National Natural Science Foundation of China [21671195, 11604346, 51502310, 21577144, 91426304]; key technology of nuclear energy, CAS Interdisciplinary Innovation Team; Swedish Foundation for Strategic Research (SSF); Synergy Grant FUNCASE; SCI(E); ARTICLE; 4; 3841-3850; 11
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/474222]
专题	工学院
推荐引用方式 GB/T 7714	Zhou, Jie,Zha, Xianhu,Zhou, Xiaobing,et al. Synthesis and Electrochemical Properties of Two-Dimensional Hafnium Carbide[J]. ACS NANO,2017.
APA	Zhou, Jie.,Zha, Xianhu.,Zhou, Xiaobing.,Chen, Fanyan.,Gao, Guoliang.,...&Huang, Qing.(2017).Synthesis and Electrochemical Properties of Two-Dimensional Hafnium Carbide.ACS NANO.
MLA	Zhou, Jie,et al."Synthesis and Electrochemical Properties of Two-Dimensional Hafnium Carbide".ACS NANO (2017).